Performance optimization of high-temperature supercritical carbon dioxide concentrating solar power plant with an improved solar receiver

IF 9.9 1区工程技术 Q1 ENERGY & FUELS

Energy Conversion and Management Pub Date : 2025-05-09 DOI:10.1016/j.enconman.2025.119883

C. Li, Y.B. Tao, S. Li, K.J Dang

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引用次数: 0

Abstract

Improving the outlet temperature of working fluid in solar receiver is an important measure to improve the thermal efficiency of power cycle used in concentrating solar power system. However, the thermal efficiency of solar receiver is sharply reduced with temperature increasing, which inevitably causes the power generation efficiency of system decreasing. In the present study, an improved structure of solar receiver is proposed and an integral computational model is established to investigate the performance of concentrating solar power system with supercritical CO₂ power cycle. The comparison results between the improved and the conventional solar receivers show that the improved solar receiver can significantly reduce heat loss and improve the thermal efficiency from 80.34% to 89.61% at the working temperature of 720 °C. The improved solar receiver is integrated into the concentrating solar power system to analyze the effects of working parameters on system performance. And the system performance is optimized by orthogonal experiment and genetic algorithms. The results show the split ratio has the most significant effect on power generation efficiency, followed by minimum pressure, molten salt outlet temperature and reheat pressure. Compared to the original system, the power generation efficiency of the concentrating solar power system can be improved from 29.20% to 34.23% by the present work.

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采用改进型太阳能接收器的高温超临界二氧化碳聚光太阳能电站性能优化

提高太阳能集热器内工质出口温度是提高太阳能集热器动力循环热效率的重要措施。然而，随着温度的升高，太阳能集热器的热效率急剧降低，这必然导致系统发电效率的下降。本文提出了一种改进的太阳能接收器结构，并建立了一个完整的计算模型来研究超临界CO2动力循环聚光太阳能发电系统的性能。在720℃的工作温度下，改进后的太阳能接收器与传统太阳能接收器的比较结果表明，改进后的太阳能接收器可以显著降低热损失，将热效率从80.34%提高到89.61%。将改进后的太阳能接收器集成到聚光太阳能发电系统中，分析了工作参数对系统性能的影响。通过正交实验和遗传算法对系统性能进行优化。结果表明：劈裂比对发电效率的影响最为显著，其次是最小压力、熔盐出口温度和再热压力。与原系统相比，本工作可将聚光太阳能发电系统的发电效率由原来的29.20%提高到34.23%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy Conversion and Management 工程技术-力学

CiteScore

19.00

自引率

11.50%

发文量

1304

审稿时长

17 days

期刊介绍： The journal Energy Conversion and Management provides a forum for publishing original contributions and comprehensive technical review articles of interdisciplinary and original research on all important energy topics. The topics considered include energy generation, utilization, conversion, storage, transmission, conservation, management and sustainability. These topics typically involve various types of energy such as mechanical, thermal, nuclear, chemical, electromagnetic, magnetic and electric. These energy types cover all known energy resources, including renewable resources (e.g., solar, bio, hydro, wind, geothermal and ocean energy), fossil fuels and nuclear resources.